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Critical Do's and Don'ts During the Mortgage Loan Process

Q Home Loans Team
November 20, 2025
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Critical Do's and Don'ts During the Mortgage Loan Process

Critical Do's and Don'ts During the Mortgage Loan Process

Essential Guidelines to Protect Your Loan Approval from Pre-Approval to Closing Day

⚡ Important: The mortgage approval process doesn't end when you're pre-approved or even when your offer is accepted. Lenders continue to monitor your financial situation right up until closing day—and sometimes even on closing day itself! One seemingly innocent financial move could delay your closing or even cause your loan to be denied.

This guide will help you navigate the critical period from application to closing without jeopardizing your loan approval.

🎯 Quick Reference: The Golden Rule

FREEZE YOUR FINANCIAL SITUATION

From the moment you apply for a mortgage until the day you close, maintain the status quo. Any change—no matter how small or well-intentioned—could impact your approval.

DON'Ts - Avoid These at All Costs

Don't Apply for New Credit CRITICAL

This includes credit cards, car loans, personal loans, student loans, store credit cards, or even responding to credit card offers.

Why It Matters: Each application triggers a hard credit inquiry that lowers your credit score. New credit also increases your debt-to-income ratio (DTI), which can disqualify you from your loan. Even a "0% financing" offer on furniture can derail your mortgage.

Don't Make Major Purchases CRITICAL

Avoid buying cars, boats, RVs, motorcycles, expensive jewelry, furniture, appliances, or any big-ticket items—even if you pay cash.

Why It Matters: Major purchases deplete your cash reserves, which lenders verify before closing. Financed purchases increase your monthly debt obligations, raising your DTI ratio. This can instantly disqualify you from your approved loan amount.

Don't Change Jobs or Quit CRITICAL

Stay in your current position throughout the entire loan process, even if offered a better opportunity.

Why It Matters: Lenders verify employment multiple times, including days before closing. Job changes—even with higher pay—reset your employment history and can require re-underwriting. Commission-based or contract positions are viewed as higher risk than salaried positions.

Don't Close Credit Card Accounts HIGH IMPACT

Even if you never use a credit card, keep it open during the loan process.

Why It Matters: Closing accounts reduces your available credit, which increases your credit utilization ratio (a 30% factor in your credit score). It also shortens your credit history length (a 15% factor). Both changes can drop your score by 50-100 points.

Don't Pay Off Collections (Usually) HIGH IMPACT

Unless specifically requested by your lender, don't pay off old collection accounts.

Why It Matters: Paying off old collections often causes your credit score to drop because it updates the "last activity date," making the negative mark appear recent. Lenders typically only care about the last 2 years of activity. If you must pay, negotiate "pay for delete" in writing first.

Don't Max Out Credit Cards CRITICAL

Keep credit card balances below 30% of the available limit, ideally below 10%.

Why It Matters: High credit utilization is the fastest way to tank your credit score—you could lose 100+ points overnight. Lenders pull credit multiple times, and a sudden spike in balances is a major red flag.

Don't Make Large or Unusual Deposits HIGH IMPACT

Avoid depositing large sums of cash or receiving large transfers that aren't regular paychecks.

Why It Matters: Unexplained deposits raise red flags about hidden loans or unreported income. You'll need to provide extensive documentation to prove the source of funds. Even legitimate gift money requires signed letters and paper trails.

Don't Transfer Money Between Accounts MEDIUM IMPACT

Keep your money where it is. Avoid moving funds between checking, savings, or investment accounts.

Why It Matters: Transfers create confusion in your paper trail and require additional documentation to verify the money wasn't borrowed. Lenders need to trace every dollar to ensure it's legitimately yours.

Don't Switch Banks MEDIUM IMPACT

Wait until after closing to open new bank accounts or move your banking relationship.

Why It Matters: Changing banks requires your lender to obtain new documentation and re-verify your assets, delaying your closing. The new account also lacks the transaction history lenders need to review.

Don't Co-Sign Loans for Others HIGH IMPACT

Helping family or friends with their credit will hurt yours during this period.

Why It Matters: Co-signed loans appear as YOUR debt on your credit report, increasing your DTI ratio. You're legally responsible for the full amount, which lenders count against your borrowing capacity.

Don't Miss or Make Late Payments CRITICAL

Pay all bills on time: mortgage/rent, car loans, credit cards, utilities, student loans, child support—everything.

Why It Matters: A single 30-day late payment can drop your credit score by 50-110 points. Lenders verify your payment history throughout the process. One late payment discovered during underwriting can cause immediate denial.

Don't Consolidate Debt MEDIUM IMPACT

Resist the urge to consolidate credit cards or refinance other debts during the mortgage process.

Why It Matters: Debt consolidation requires new credit applications and inquiries. It also changes your credit utilization and account history, potentially lowering your credit score despite good intentions.

Don't Freeze Your Credit Reports HIGH IMPACT

If you have security freezes in place, don't add new ones, and be ready to lift existing ones.

Why It Matters: Lenders monitor your credit throughout the loan process. A frozen credit report prevents them from accessing your information, which will delay or stop your loan approval. Notify your lender if freezes exist.

Don't Change Your Spending Patterns MEDIUM IMPACT

Maintain your normal spending habits on credit cards and bank accounts.

Why It Matters: Sudden changes in spending patterns trigger red flags in credit scoring algorithms. If you've paid Netflix monthly for years, keep doing so. Consistency demonstrates financial stability.

Don't Ignore Lender Communications CRITICAL

Respond immediately to all emails, calls, and document requests from your lender.

Why It Matters: Incomplete paperwork is the #1 cause of underwriting delays. Every day of delay risks rate lock expiration or the seller canceling the contract. Prompt responses keep your closing on track.

DO's - Follow These Guidelines

Do Make All Payments On Time

Set up automatic payments if possible to ensure nothing is missed.

Why It Matters: On-time payments demonstrate reliability and protect your credit score. This includes rent/mortgage, car payments, credit cards, utilities, student loans, and child support. Even one late payment can sink your loan.

Do Keep All Accounts Current

Maintain every financial obligation you have: loans, credit cards, phone bills, subscriptions.

Why It Matters: Lenders verify your entire financial picture multiple times. Current accounts demonstrate financial responsibility and stability. Delinquent accounts, even small ones, raise serious red flags.

Do Use Credit Cards Normally

If you typically use credit cards for daily expenses, continue. If you rarely use them, keep it that way.

Why It Matters: Consistency is key. Sudden changes in credit behavior trigger scoring algorithm warnings. Normal usage patterns demonstrate stable financial management.

Do Keep Your Job

Stay in your current position, even if you receive a better offer. Wait until after closing.

Why It Matters: Stable employment is a cornerstone of loan approval. Lenders verify your job days before closing, sometimes on closing day itself. Any change requires re-underwriting and could derail your purchase.

Do Maintain Adequate Cash Reserves

Keep enough money in your accounts to cover down payment, closing costs, and reserves.

Why It Matters: Lenders verify your assets multiple times before closing. If your account balances drop below required levels, your loan will be denied. Plan for unexpected expenses but don't deplete accounts.

Do Communicate with Your Lender

Before making ANY financial decision, ask your lender if it's safe. When in doubt, ask.

Why It Matters: Your lender is your best resource during this process. What seems harmless to you might be a deal-breaker for your loan. A quick phone call can save your home purchase.

Do Respond Promptly to Document Requests

Provide requested documents within 24 hours whenever possible.

Why It Matters: Quick responses prevent delays in underwriting. Every day matters when you have a closing deadline and rate lock expiration. The faster you respond, the faster you close.

Do Provide Complete and Accurate Information

Be thorough and honest on all applications and documentation.

Why It Matters: Incomplete or inaccurate information causes delays and raises suspicions. Lies or omissions can result in loan denial or even prosecution for fraud. Honesty and thoroughness expedite approval.

Do Keep Paper Trails for Everything

Save receipts, statements, and documentation for all financial transactions.

Why It Matters: You'll need to document and explain deposits, withdrawals, and transfers. Having organized records ready speeds up the underwriting process and prevents delays.

Do Set Up Credit Monitoring

Use your bank's free credit monitoring or a service to alert you to changes.

Why It Matters: Early detection of credit report errors, fraud, or unexpected changes allows you to address issues before your lender discovers them. Real-time alerts give you time to fix problems.

Do Continue Living Below Your Means

Practice financial restraint and avoid unnecessary expenses during this period.

Why It Matters: Conservative spending protects your cash reserves and demonstrates financial discipline. Lenders review bank statements for spending patterns that might indicate financial stress.

Do Inform Your Lender of Life Changes

Getting married, having a baby, legal name changes—tell your lender immediately.

Why It Matters: Life changes affect your loan documents. A spouse must sign the mortgage even if not on the loan. Name changes create document discrepancies. Early communication prevents last-minute delays.

Do Keep Documentation Organized

Create a file (physical or digital) with all loan-related documents in one place.

Why It Matters: Quick access to documents speeds up responses to lender requests. Organization reduces stress and prevents missing important paperwork during the already-stressful home buying process.

Do Read Everything Carefully

Review all documents, emails, and disclosures thoroughly before signing or responding.

Why It Matters: Understanding what you're signing protects you from errors and surprises. Questions are easier to address before closing than after. Knowledge of the process reduces anxiety and confusion.

Do Maintain Your Current Living Situation

If renting, keep your lease. If living with family, stay put. Don't move until after closing.

Why It Matters: Address changes during the loan process create paperwork complications and require additional verification. Stable housing demonstrates stability to lenders.

⏰ When These Rules Apply: From Application to Closing

Critical Time Periods

  • Pre-Approval Phase: Rules apply from the moment you submit your first loan application. Changes here affect your pre-approval amount and rate.
  • Home Shopping Phase: Continue following all rules. Your finances must match your pre-approval when you make an offer.
  • Under Contract: MOST CRITICAL PERIOD. One mistake here can cost you your dream home and earnest money deposit.
  • During Underwriting: Zero tolerance for changes. Underwriters scrutinize every detail of your financial life.
  • Before Closing: Lenders pull credit again days before closing. Late payments or new debt discovered here mean immediate denial.
  • Closing Day: Some lenders verify employment on closing day. Don't quit your job until AFTER you have the keys!

🎯 Key Takeaways: What You Need to Remember

  • Freeze Frame Your Finances: Imagine your financial life is paused from application to closing. No changes = no problems.
  • Credit Score is King: Every action affecting your credit score can impact your loan approval and interest rate. Protect it fiercely.
  • Debt-to-Income Ratio Matters: New debt or reduced income changes your DTI, which can disqualify you from your approved loan amount.
  • Paper Trail is Everything: Every dollar must be documented and explained. Unexplained funds equal denied loans.
  • When in Doubt, Ask: Your lender would rather answer 100 questions than deny your loan. There are no stupid questions.
  • Lenders Verify Multiple Times: Don't think "they already approved me." Lenders check employment, credit, and assets repeatedly until closing.
  • Even Cash Purchases Matter: Paying cash for a car depletes reserves lenders need you to maintain. How you spend matters as much as debt.
  • Patience Pays Off: Wait a few weeks for major purchases. Don't sacrifice your home for furniture or a new car.

Common Myths That Can Cost You

  • Myth: "I'm already pre-approved, so I can relax."
    Reality: Pre-approval is conditional. Lenders verify everything again before closing.
  • Myth: "Paying off debt improves my chances."
    Reality: Paying off collections often lowers your credit score. Ask your lender first.
  • Myth: "Closing unused credit cards will help."
    Reality: Closing accounts typically drops your credit score by reducing available credit.
  • Myth: "Cash purchases don't affect my loan."
    Reality: Large cash purchases deplete reserves lenders require you to maintain.
  • Myth: "If I don't tell them, they won't know."
    Reality: Lenders pull credit multiple times and verify employment through closing day. They WILL find out.
  • Myth: "Small purchases won't matter."
    Reality: Even financing a $2,000 appliance increases your DTI and could disqualify you.

What If Something Unavoidable Happens?

Life doesn't stop during your mortgage process. If something unavoidable occurs:

  • Call Your Lender IMMEDIATELY: Before making any decision or signing anything, get guidance from your loan officer.
  • Document Everything: Gather all related paperwork and be prepared to provide detailed explanations.
  • Be Honest: Attempting to hide changes will result in denial. Transparency gives your lender a chance to work with you.
  • Understand Consequences: Some changes may require delaying closing, re-underwriting, or even starting over. Accept this reality.
  • Examples of Unavoidable Events: Layoffs, medical emergencies, death in family, identity theft, divorce, disability. These require immediate lender notification.

Your Dream Home is Worth the Wait

The mortgage process typically takes 30-45 days. That's a small sacrifice for achieving homeownership. The new car, furniture, and credit cards will still be available AFTER you close on your home.

When in doubt: DON'T. Ask first.

Your lender is your partner in this process. Use them as a resource. Their job is to get you to the closing table successfully.

This guide is for educational purposes based on common mortgage industry practices. Specific lender requirements may vary. Always consult directly with your lender before making any financial decisions during the mortgage process.

© 2024 Mortgage Loan Process Guide

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About the Author

Q Home Loans Team is a mortgage loan officer at Q Home Loans, dedicated to helping families achieve their homeownership dreams.

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